efl-csharp: Add copy constructor for eina.Value.

Summary: This will allow deep copying the given value from C#.

Reviewers: felipealmeida, vitor.sousa, segfaultxavi

Reviewed By: vitor.sousa, segfaultxavi

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D7017

src/bindings/mono/eina_mono/eina_value.cs

@@ -766,6 +766,18 @@ public class Value : IDisposable, IComparable<Value>, IEquatable<Value>
         Setup(containerType, subtype, step);
     }
 
+    /// <summary>Deep copies the given eina Value</summary>
+    public Value(Value v)
+    {
+        Handle = Alloc();
+        if (!eina_value_copy(v.Handle, this.Handle))
+            throw new System.InvalidOperationException("Failed to copy value to managed memory.");
+
+        Disposed = false;
+        Flushed = false;
+        Ownership = Ownership.Managed;
+    }
+
     /// <summary>Constructor to build value from Values_Natives passed by value from C.</summary>
     public Value(Value_Native value)
     {

src/tests/efl_mono/Value.cs

@@ -836,6 +836,21 @@ public static class TestEinaValue {
         }
     }
 
+    public static void TestValueCopy() {
+        eina.Value v2 = null;
+        int raw_val = 42;
+
+        using (eina.Value v = new eina.Value(eina.ValueType.Int32)) {
+            Test.Assert(v.Set(raw_val));
+
+            v2 = new eina.Value(v);
+        }
+
+        int rec_val;
+        Test.Assert(v2.Get(out rec_val));
+        Test.AssertEquals(raw_val, rec_val);
+    }
+
     // FIXME Add remaining list tests
 
     /* public static void TestValueHash() { */